Investigators have concluded that it was speedy driving and not mechanical failure that killed Fast & Furious star Paul Walker and his friend Roger Rodas last November.

Rodas was driving the actor’s 2005 Porsche Carrera GT at about 90 miles per hour when it spun out of control and crashed into a light pole, the Associated Press reports. The speed limit on the suburban street outside of Los Angeles was 45 mph.

“The vehicle had no mechanical failure and the damage that occurred to the vehicle was from the collision,” according to a person who reviewed the Los Angeles County Sheriff’s Department and California Highway Patrol’s report. The Associated Press’ source asked to remain anonymous because the report hasn’t been released to the public yet.

Investigators determined the car’s electrical systems, brakes, throttle, fuel system and steering systems had been functioning properly at the time of the crash.